Yes, it's now called "Twisted House". A facade has been built in front of the whole ride and there are lots of models in the windows, some of which seem to be from Great Yarmouth's old "Ghostblasters" attraction. In fact, Nick, I know you have been on Ghostblasters - can you give us any clue as to what new models/features may actually be inside the Walton ride now?
Also, the area around the ghost train that used to be outside is now totally enclosed. The waltzer has also been moved to the right of the ghost train, a space that has previously had a Superbowl ride on it and, before that, the ride where you went over a big hill (Barracuda?)
Actually, it'll be interesting to see what they put where the waltzer used to be (to the left of the ghost train).
Anyway, two pictures can currently be seen at these addresses:
http://www.amusementreview.co.uk/twisted_house.jpg
http://www.amusementreview.co.uk/twisted_house2.jpg
I went there a few weeks ago and they told me it was actually due to open the first Saturday of the Christmas holidays. However, I haven't actually been to check it out since, and it hasn't been in the press, so I don't know any more about it at present.